Use spf13/cobra for docker pause

This fix is part of the effort to convert commands to spf13/cobra #23211.

Thif fix coverted command `docker pause` to use spf13/cobra

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

api/client/commands.go

@@ -18,7 +18,6 @@ func (cli *DockerCli) Command(name string) func(...string) error {
 		"load":    cli.CmdLoad,
 		"login":   cli.CmdLogin,
 		"logout":  cli.CmdLogout,
-		"pause":   cli.CmdPause,
 		"ps":      cli.CmdPs,
 		"pull":    cli.CmdPull,
 		"push":    cli.CmdPush,

api/client/container/pause.go

@@ -0,0 +1,51 @@
+package container
+
+import (
+	"fmt"
+	"strings"
+
+	"golang.org/x/net/context"
+
+	"github.com/docker/docker/api/client"
+	"github.com/docker/docker/cli"
+	"github.com/spf13/cobra"
+)
+
+type pauseOptions struct {
+	containers []string
+}
+
+// NewPauseCommand creats a new cobra.Command for `docker pause`
+func NewPauseCommand(dockerCli *client.DockerCli) *cobra.Command {
+	var opts pauseOptions
+
+	cmd := &cobra.Command{
+		Use:   "pause CONTAINER [CONTAINER...]",
+		Short: "Pause all processes within one or more containers",
+		Args:  cli.RequiresMinArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.containers = args
+			return runPause(dockerCli, &opts)
+		},
+	}
+	cmd.SetFlagErrorFunc(flagErrorFunc)
+
+	return cmd
+}
+
+func runPause(dockerCli *client.DockerCli, opts *pauseOptions) error {
+	ctx := context.Background()
+
+	var errs []string
+	for _, container := range opts.containers {
+		if err := dockerCli.Client().ContainerPause(ctx, container); err != nil {
+			errs = append(errs, err.Error())
+		} else {
+			fmt.Fprintf(dockerCli.Out(), "%s\n", container)
+		}
+	}
+	if len(errs) > 0 {
+		return fmt.Errorf("%s", strings.Join(errs, "\n"))
+	}
+	return nil
+}

api/client/pause.go

@@ -1,36 +0,0 @@
-package client
-
-import (
-	"fmt"
-	"strings"
-
-	"golang.org/x/net/context"
-
-	Cli "github.com/docker/docker/cli"
-	flag "github.com/docker/docker/pkg/mflag"
-)
-
-// CmdPause pauses all processes within one or more containers.
-//
-// Usage: docker pause CONTAINER [CONTAINER...]
-func (cli *DockerCli) CmdPause(args ...string) error {
-	cmd := Cli.Subcmd("pause", []string{"CONTAINER [CONTAINER...]"}, Cli.DockerCommands["pause"].Description, true)
-	cmd.Require(flag.Min, 1)
-
-	cmd.ParseFlags(args, true)
-
-	ctx := context.Background()
-
-	var errs []string
-	for _, name := range cmd.Args() {
-		if err := cli.client.ContainerPause(ctx, name); err != nil {
-			errs = append(errs, err.Error())
-		} else {
-			fmt.Fprintf(cli.out, "%s\n", name)
-		}
-	}
-	if len(errs) > 0 {
-		return fmt.Errorf("%s", strings.Join(errs, "\n"))
-	}
-	return nil
-}

cli/cobraadaptor/adaptor.go

@@ -38,6 +38,7 @@ func NewCobraAdaptor(clientFlags *cliflags.ClientFlags) CobraAdaptor {
 		container.NewDiffCommand(dockerCli),
 		container.NewExportCommand(dockerCli),
 		container.NewLogsCommand(dockerCli),
+		container.NewPauseCommand(dockerCli),
 		container.NewPortCommand(dockerCli),
 		container.NewRunCommand(dockerCli),
 		container.NewStartCommand(dockerCli),

cli/usage.go

@@ -23,7 +23,6 @@ var DockerCommandUsage = []Command{
 	{"load", "Load an image from a tar archive or STDIN"},
 	{"login", "Log in to a Docker registry"},
 	{"logout", "Log out from a Docker registry"},
-	{"pause", "Pause all processes within a container"},
 	{"ps", "List containers"},
 	{"pull", "Pull an image or a repository from a registry"},
 	{"push", "Push an image or a repository to a registry"},